Cinema Display light blinking

[stuartm]

Hi
I have a old powermac G5 with cinema 9white) display. The power light on bottom right of the display blinks three times constantly.
Ive noticed also that my monitor brightness is lower.
Is my display on the way out or is this blinking pattern warning me of something else?

Thanks in anticipation.
Stuart

 

[archtopshop]

I just googled "Apple cinema display light blinking" and this was at the top of the list:

http://support.apple.com/kb/HT2811

 

[stuartm]

I just googled "Apple cinema display light blinking" and this was at the top of the list:

http://support.apple.com/kb/HT2811

thanks. I think it is a backlight error.
Much appreciated.
Stuart